Artificial fuel.



UNITED STATES PATENT OFFICE.

GEORGE M. DALLAS, OF CHICAGO, ILLINOIS, ASSIGN OR OF ONE-HALF TO WILLIAMR. CHITTENDEN, OF CHICAGO, ILLINOIS.

ARTIFICIAL FUE L.

SPECIFICATION forming part of Letters Patent No. 706,533, dated August12,1902.

Application filed May 2, 1902. Serial No. 105,687. (No specimens.)

To aZZ whom it may concern:

Be it known that I, GEORGE M. DALLAS, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Im provements in Artificial Fuel; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others 'skilled in theart to which it appertains to make and use the same.

My invention relates to certain new and useful improvements comprised inthe production of a cheap and convenient form of fuel; and it consistsof a certain novel process of treatment, as will be hereinafter fullydescribed and claimed.

The object of my invention is to produce a cheap and convenient form offuel from a combustible substance which is now completely lost, andtherefore wholly unutilized, as I am able to form in compact or solidcondition briquets or billets from what is commonly termed slack or culmor the pulverized portion or dust from hard or lump soft coal which is aby-product or incidental result of coal-minin g.

I am able to take a cheap form of coal and first pulverize it, which maybe used alone or in combination with a less combustible form ofcoal-dust, culm, or the like, as will be readily understood, and myprocess of manufacturing briquets or the like from this form ofsubstance may be stated to be as follows: I first take pulverizedcoal-as slack, culm, or the like-and raise the temperature thereof in asuitable oven to the point of ignition, or the temperature thereof maybe raised, as by running it through a heated cylinder or tube ofsuitable size. After having heated to the point of ignition thepulverized coal is discharged into preferably a horizontal cylinder ormixer, when the following ingredients, de signed for the purpose ofhardening the substance When cool, are added-that is to say, a mixtureis added which comprises fifty gallons paraffin residuum, ten pounds ofborax, twenty-five pounds of antimony, three pounds acetic acid,twenty-five pounds salt, two hundred pounds clay, one peck oil-cakemeal, five pounds potash, all of which is boiled in thirty gallons ofwater. The proportions of the above ingredients are designed as beingsufficient for twenty-five tons of coal. After the said mixture has beenthoroughly incorporated with the coal-dust, briquets or billets of whichthe fuel may be readily formed by any machine suitable for the purpose.

My improved fuel will be found to be very desirable, inasmuch as it ismore durable than anthracite coal, it being easily handledwithoutsoilinghandsof theuser. Itwillbefound that the combustion isperfect, inasmuch as the ingredients incorporated as above will insurethat all the gases generated are consumed, and the coal is thereforesmokeless, and there will be no clinkers or disagreeable odors. It willbe found that it may be readily shipped from point to point withoutbecoming disintegrated, inasmuch as moisture, heat, or cold' will notafiect it, so as to produce undesirable results. It will also be foundthat there will be less residuum in the form of ashes and, furthermore,that it may be produced at a minimum cost.

It will be found that any kind of clay being incorporated with compoundwill form and create satisfactory heat without smoke, soot, or cinders.Four grades of fuel can be produced with this compound, and thecrystallization of the different ingredients is caused by the action ofthe difierent chemicals one upon the other. Therefore it does notrequire heavy pressure or adhesive powers to create a hard product; butpressure upon it creates quicker results.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-- The herein-described artificialfuel consisting of first treating the culm or coal-dust to a temperaturewhich will raise it to the point of ignition and afterward mixing theheated dust with a mixture composed of fifty gallons of paraffinresiduum, ten pounds borax, twenty-five pounds antimony, three poundsacetic acid, one peck oil-cake meal, two hundred pounds clay, fivepounds crude potash boiled in thirty gallons water, twenty-five poundssalt, to twenty-five tons of coal-dust, all combined in the mannerspecified and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE M. DALLAS.

Witnesses:

HENRY PIKE, ALBERT A. CAMPBELL.

